Robert Downey Jr. and his fiancée of two years, 31-year-old Susan Levin, tied the knot Saturday in a candlelit, sunset ceremony at a private estate in Amagansett, Long Island.

The 40-year-old star dressed in a suit and sneakers as he walked down the isle. Keanu Reeves arrived to the event on a motorcycle, and Billy Joel and Sting both performed.

People magazineís Julie Dam told "Extra" how Downey Jr. prepared for his big day: "On Saturday before the wedding, Robert did 30 minutes of kung fu and swam with his son, Indio, to unwind."

"The decorations were really understated with red and gold tables and exotic plants on the tables instead of flowers," Dam added.

Downey Jr. and Levin met on the set of the film "Gothika," which Levin produced. "I tried to remain professional, but his charm just won me over," she admitted.

But the festivities didnít end there. On Friday, Downey Jr.ís one-time girlfriend, Sarah Jessica Parker, Rosanna Arquette and Lorraine Bracco attended the coupleís rehearsal dinner at a restaurant in the Hamptons. And on Sunday, the newlyweds hosted a Sunday brunch for guests and friends.